Directed by
| Norman Lee | ||
Writing Credits
| Edgar Wallace | ... | (novel) |
| Norman Lee | ... | (screenplay) and |
| Gilbert Gunn | ... | (screenplay) |
| John Argyle | ... | (treatment) |
Cast (in credits order) complete, awaiting verification
| Leslie Banks | ... | Dr. Manetta | |
| Lilli Palmer | ... | June Lansdowne | |
 |
Romilly Lunge | ... | Dick Martin |
| Gina Malo | ... | Glenda Baker | |
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Richard Bird | ... | Det. Inspector Cornelius 'Andy'Sneed |
| David Horne | ... | Edward Havelock | |
| J.H. Roberts | ... | Luis Silva | |
| Cathleen Nesbitt | ... | Ann Cody | |
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Harry Hutchinson | ... | Bevan Cody |
| Philip Ray | ... | Tom Cawler (as Phil Ray) | |
|
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Robert Montgomery | ... | Craig the Butler (as R. Montgomery) |
| Aubrey Mallalieu | ... | Lord Charles Francis Selford | |
|
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Ross Landon | ... | John Selford |
| Rest of cast listed alphabetically: | |||
|
|
Raymond Mander | ... | P.C. in Sneed's Office (uncredited) |
| Charles Paton | ... | Handwriting Expert (uncredited) | |
|
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George Street | ... | Chief Commissioner (uncredited) |
Produced by
| John Argyle | ... | producer |
Music by
| Guy Jones | ... | (uncredited) |
Cinematography by
| Alex Bryce | ... | (photography) |
| Ernest Palmer | ... | (photography) |
Editing by
| Ted Richards | ... | (as E.G. Richards) |
Art Direction by
| J. Charles Gilbert | ... | (as C. Gilbert) |
Production Management
| Hamilton G. Inglis | ... | production manager (as H.G. Inglis) |
Second Unit Director or Assistant Director
| Roy Parkinson | ... | first assistant director (uncredited) |
Sound Department
| Harry Benson | ... | sound supervisor (as H. Benson) |
| F. McNally | ... | sound recordist |
Camera and Electrical Department
| Ronald Anscombe | ... | camera operator |
Music Department
| Guy Jones | ... | musical director |
